Portable waterless water closet

ABSTRACT

This invention relates to a portable waterless water closet wherein the waste materials are sealed off and stored for subsequent removal in a disposable bag stored in a magazine beneath the seat. More specifically, the invention is directed to the manually operated mechanism that includes a pair of counterrotating shoe-carrying elements that grasp and pull successive lengths of the bag from the magazine while, at the same time, cooperating with a pair of opposed spring-loaded jaw members to provide a double seal isolating the waste materials in a storage compartment during the interval between successive uses. Each of the counterrotating elements carry both primary and secondary shoes adapted to alternately and successively grip and pull the bag while camming the spring-loaded jams apart during the bag-pulling operation. These shoe-carrying elements are operatively interconnected such that rotation of one through a complete revolution brings about a corresponding rotation of the other and also completes the waste disposal cycle.

iliiiieel Mates atet Winters lPilllil'llABlLlE WATIERLESS WATER CLUSET[72] Inventor: Paul '11. Winters, Arvada, C010.

[73] Assignee: Development industries, iilflC-, Denver,

[22] Filed: Oct. 22, 1970 [21] Appl. No: 83,060

[52] U.S.Cl ..4/l42 [51] ..A47lt 111/02 [58] llieldolSearch..4/142,l1l,1l5,1l6,1l9, 4/121,128,131,l38,141;251/7,9

[56] References Cited UNITED STATES PATENTS 2,671,906 3/1954 Potts.......4/111 3,401,409 9/1968 Ekrut.... ..4/142 3,416,164 12/1968 Ekrut 4/1423,452,368 7/1969 Couper ..4/142 3,473,779 10/1969 Gustafson et a1 4/142X Primary Examiner-l-lenry l(. Artis Attorney-Anderson, Spangler &Wymore [5 7] ABSTRACT This invention relates to a portable waterlesswater closet wherein the waste materials are sealed] off and stored forsubsequent removal in a disposable bag; stored in a magazine beneath theseat. More specifically, the invention is directed to the manuallyoperated mechanism that includes a pair of counterrotating shoe-carryingelements that grasp and pull successive lengths of the bag from themagazine while, at the same time, cooperating with a pair of opposedspring-loaded jaw members to provide a double seal isolating the wastematerials in a storage compartment during the interval betweensuccessive uses. Each of the counterrotating elements carry both primaryand secondary shoes adapted to alternately and successively grip andpull the bag while camming the spring-loaded jams apart during thebag-pulling operation. These shoe-carrying elements are operativelyinterconnected such that rotation of one through a complete revolutionbrings about a corresponding rotation of the other and also completesthe waste disposal cycle.

10 Claims, 9 Drawing Figures PATENTEDMAR M I972 CLMELBOZ SHEET 2 [IF 2INVENTOR PAUL WINTERS PORTABLE WATEWLIESS WATER CLOSET Restrooms for usein locations where no plumbing is available are, of course, quitecommon. One of the best known units has a septic tank filled with achemical waste-treatment solution that is periodically pumped out andreplaced. This requirement of periodic servicing renders the unitundesirable for use in remote areas and it is, therefore, generallyfound on golf courses, construction sites and recreation areas close tourban centers. About all that is left in the way of a restroom for theremote area is the conventional Chic Sale" outhouse which, as everyoneknows, leaves much to be desired.

As a result, there have been several attempts in recent years to developsome kind of self-contained portable water closet that needed no waterand could be taken along to remote campsites for use in a trailer, tentor camper where no conventional waste-disposal hookup was available. Onesuch unit used an incineration technique for disposal of the wastematerials but it proved to be expensive to manufacture as well asoperate and it had several mechanical shortcomings. On the positiveside, however, was the fact that the waste was almost completelyconsumed except for a small amount of residual ash and the unit was leftcompletely sanitary and odor-free after use.

By far the most successful approach to date has been to package thewaste materials in some sort of disposable container which can be sealedand stored until facilities for its permanent disposal became available.The problems have been those of finding a suitable disposable containerthat is strong yet inexpensive, a way of sealing the container andkeeping it sealed until it can be properly disposed of, and, mostimportant, an automatic or semiautomatic mechanism for carrying out thewaste-disposal cycle. The several sanitary and aesthetic considerationsare so obviously a part of any acceptable unit as to require no specificmention.

So far the most acceptable of the prior art waterless water closetsdesigned around the disposable container principal is one in which alength of plastic tubing is stored in a suitable magazine and tied atone end to define a bag which is then drawn out incrementally followingeach use by a flipflop type system of four rollers that function as boththe bag-pulling mechanism and the seals therefor. Several shortcomingsare, however, inherent in such a design that seriously detract from itsfeasability and commercial acceptability. Of primary significance is thefact that each complete waste-disposal cycle resulted in only 3 or 4inches of tubing being pulled from the magazine which is insufficient toinsure the complete removal of the waste into the storage area. Part ofthe problem is traceable to the fact that the rollers are allowed torotate freely as they move down along the bag in their attempt to draw afresh supply from the magazine. In so doing, however, the rollers have atendency to turn backwards thus withdrawing less than is needed to carrythe previously used portion thereof on down into the storage area. Onthe other hand, mounting these rollers so that they cannot turn canprove to be even less desirable because when they flip over and snapshut with a jawlike action against the bag, the chances of rupturing thelatter are vastly increased.

Actuation of the above-described prior art unit requires substantialpower to tension the springs and rotate the rollers through theirflip-flop waste removal sequence. As a result a major manual maneuverrequiring both hands and considerable force was necessary to carry outthe waste removal sequence.

lt has now been found in accordance with the teaching of the instantinvention that these and other shortcomings of the prior art waterlesswater closet designs can be completely eliminated by the simple, butunobvious expedient of substituting a pair of counterrotating poweredshoe-carrying elements for the four flip-flop action rollers and usingthese elements to open a snap action gate that spring-closed against thebag only upon completion of the bag-pulling sequence. Theseshoe-carrying elements turn slowly and uniformly about fixed axes ofrotation so as to steadily draw the bag from its magazine withoutsubjecting it to undue strain. The bagengaging surfaces of both therotating element shoes and the jaws of the snap action gate are allcushioned to further protect the bag from rupture, abrasion or otherdamage.

The radial displacement of the shoes carried by each rotating elementfrom its axis of rotation and the fact that these elements are driven ina direction to withdraw the bag from the magazine insure that anadequate length thereof is withdrawn to carry the waste well on downinto the waste storage area, Furthermore, by drawing an excess length offresh bag from the magazine, both seals made by the secondary shoes andthe jaws of the snap action gate are made against a fresh empty sectionthereof well above the soiled portion.

The waste disposal sequence is carried out by merely turning one of thecounterrotating elements through a single complete revolution and thisrequires so little power as to be readily accomplished by pulling on alanyard attached to a spring-wound reel of the type incorporating asingle revolution clutch.

It is, therefore, the principal object of the present invention toprovide a novel and improved portable waterless water closet.

A second objective is to provide a water closet of the typeaforementioned that is completely self-contained.

Another object is to provide a waste disposal unit that is odorless andsanitary.

Still another objective is the provision of a device such as thatdisclosed and claimed herein in which each actuation of the wastedisposal mechanism is operative to remove the waste products from themechanical action thereof and into a storage area.

An additional object is to provide a reusable receptacle for wasteproducts that is double sealed at all times between uses.

Further objects of the above-described invention are to provide a watercloset for use in remote areas that is compact, lightweight, relativelyinexpensive, simple to operate, rugged, easily services, safe for evensmall children to use and decorative in appearance.

Other objects will be in part apparent and in part pointed outspecifically hereinafter in connection with the description of thedrawings that follows and in which:

FIG. l is a fragmentary side elevation with portions of the case andactuating mechanism broken away to better reveal the interiorconstruction;

HO. 2 is a fragmentary bottom plan view of the unit with the baseremoved and certain portions of the operating mechanism broken away tomore clearly expose the mechanical features; and,

FIGS. 3-9, inclusive, are a series of simplified side elevationaldiagrams to a reduced scale showing successive steps in the wastedisposal cycle.

Referring next to the drawings for a detailed description of the presentinvention and, initially, to FIGS. 1 and 2 for this purpose, referencenumeral has been selected to broadly designate the portable water closetin its entirety while numeral 112 has been employed to similarlydesignate the operating mechanism housed therein. The unit is housed ina hollow generally rectangular boxlike case 16 made up of threeseparable sections stacked one on top of the other. The lowermostsection or base 18, only the upper portion of which is shown, comprisesnothing more than an open-topped receptacle which functions as a storagecompartment for the waste material confined in the bag 20.

Sitting atop the base 18 is the midsection 22 which is open both top andbottom and, in the particular form shown, is rectangular having rightand left sidewalls 7.4 interconnected by integrally formed front andrear end walls. in the preferred embodiment shown, the midsection 22 ishingedly connected to the base by means of a hinge 3th on the rear wallwhile the front wall is provided with some kind of releasable latch 32.This construction enables the midsection 22 and top section 32 to betilted back to expose the base section so that the waste material can beremoved that is temporarily stored therein for permanent disposal.

The top section 32 has the waste-receiving opening 34 therein and thusfunctions as the seat of the unit. It is shown covered by a lid 36hingedly connected thereto by a hinge 38 extending along the rear edge.This subassembly that includes lid 36 and seat-forming top section 32is, likewise, made detachable from the midsection 22. In the particularform illustrated, a simple telescopic connection 40 is provided whichpermits the seat to be lifted free of the midsection so as to expose theannular trough 42 formed by inwardly extending ledge 44 that is borderedon its inner margin by upstanding flange 46.

Resting atop ledge 44 of trough 42 beneath seat 32 is a magazine 48 thatcarries a supply of plastic tubing 50 stored therein which, upon beingtied with a knot as indicated at 52 in FIGS. 3-9 becomes thewaste-receiving bag 20. This magazine 48 is defined by a bottom wall 54bordered along both its inner and outer circumferential margins byradially spaced inner and outer walls 56 and 58. The top wall 60 isformed integral with outer wall 58 but is disconnected from the innerwall 56 to leave continuous annular gap 61 therebetween through whichthe tubing 50 passes into the compartment within the midsection housingthe bag-pulling and sealing mechanism 12. As shown, the tubing is storedwithin the magazine 42 in accordion-pleated folds. Since the portion ofthe seat bordering the waste-receiving opening 34 completely covers themagazine and projects well in beyond the gap 61 in the latter, all ofthe tubing left stored in said magazine is fully protected againstcontamination.

Next, the mechanism 12 by which the bag-forming tubing is pulled fromthe magazine and sealed will be described in detail in connection withthe same two figures, namely, FIGS. 1 and 2. Extending from front torear of the midsection 22 are a pair of transversely spaced mountingbrackets 62 that are also spaced inwardly of their adjacent sidewalls.Journaled for rotation between these brackets are a pair of identicalshoecarrying elements 64 that cooperate with one another uponcounterrotational movement to (I) pull the bag from the magazine, (2)actuate a pair of spring-loaded gate-forming jaws 66, and (3) cooperatewith the latter elements to form a double seal on the neck 68 of the bagpassing therebetween. Both of these shoe-carrying elements haveintegrally formed coaxial stub shafts 70 and 72 projecting from oppositeends thereof that terminate in sections of reduced diameter 74 that arejoumaled within appropriately sized openings (not shown) in thebrackets.

Intermediate the ends of these shoe-carrying members are transverselyextending primary and secondary shoes 76 and 78, respectively, spacedapart angularly from one another so as to leave substantial gaps orvoids 80 and 82 therebetween. As shown, both of these gaps are obtuse inangular extent, gap 82 being approximately 120 while gap 80 approachesI80".

The primary shoes 76 are shaped such that their outermost extremitiesdefine cylindrical surfaces reaved about the axis of rotation of theirrespective shoe-carrying elements as a radius. The spacing between theparallel axes of rotation of these shoe-carrying elements isapproximately double the radius of curvature of the primary shoe orequal to the diameter of the cylindrical surface defined thereby so thatthese shoes move into tangent rolling engagement against one anotherupon counterrotational movement of the shoe-carrying elements as showndiagrammatically in FIGS. 6 and 7. Each shoe 76 is overlaid by acompressible pad or cushion 84 which will cooperate with the mating padon the other shoe and squeeze the bag tightly enough therebetween andwith enough frictional resistance to pull the bag from the magazine.

The secondary shoes 78 are, as previously mentioned, located on theopposite side of the axis of rotation from the primary shoes althoughthey project radially the same distance as the latter shoes, are coveredby cushioned pads 86, and cooperate with one another to squeeze the bagtherebetween as clearly shown in FIGS. 1, 3, 8 and 9. While the paddedends of these secondary shoes are curved as most clearly shown in FIG.1, they need not be cylindrically curved about the axis of rotation ofthe shoe-carrying elements because they are a good deal thinner than theprimary shoes and, therefore, do not stay in contact with the bag aslong.

counterrotational movement of the shoe-carrying elements 64 isaccomplished by means of a pair of meshed gears 88 and 90 mounted,respectively, on shafts 70 and 72. One of the gears (88) is the drivegear of the pair while the other (90) is the driven one. As will beexplained in detail presently in connection with the diagrams of FIGS.3-9, one complete waste disposal cycle involves a single 360 revolutionof both shoecarrying elements so that the secondary shoes 78 move fromthe starting positions they occupy in FIG. 1 all the way around in thedirection of the arrows and back to their original positions. There are,of course, any number of well-known mechanisms that can be used to turnshaft 70 through a single revolution such as a simple dog-leg crank;however, in the particular form shown, a conventional lanyard-operatedspringreturn reel 92 of the type used as starters on small two andfour-cycle intemal-combustion engines is shown operatively connected tothe shaft 70 carrying the drive gear 88. As illustrated, the lanyard 94passes around a pulley 96 and its handle 98 is housed within a recess100 formed in the sidewall 24 of the case after it emerges from the reelhousing 102. The reel is equipped with a single-revolution stop (notshown) of conventional design so that each pull of the lanyard willbring about 360 counterrotational movement of both shoecarryingelements. The reel also includes the usual spring and one way clutch,neither of which have been shown, which cooperate to rewind the lanyardwithout actuating either of the shoe-carrying elements.

Each of the shoe-carrying elements 64 carries on one end thereof acylindrical cam track 104 having a notch 106 therein. These cam tracksare so positioned that the one carried by the front shoe-carryingelement 64F is on the right end thereof while the one carried by therear shoe-carrying element 64R is on the left end. The cylindricalsurface of these cams is a little over 270 in angular extent while thenotch is slightly less than 90 as is revealed quite clearly in FIGS. 6and The gate-forming jaws 66 comprise elongate parallel members, theleading edges of which are cushioned as indicated at 108 and which mateto provide a seal along the neck 68 of the bag when the latter is passedtherebetween as shown in FIG. I. The length of these mating jaws isgreater than that of the shoe-carrying elements and parallel arms 1 10and 112 are provided at opposite extremities thereof which are mountedon the stub shafts 70 and 72 for free relative rotational movement. Arm110 differs from its companion arm 112 in that the latter one carriesthe cam follower 114 projecting therefrom into position to engage andride the cam surface 104. Thus, arm 1l2F is located on the left end offront shoe-carrying element 64F where it can ride the cam on thecorresponding end of the rear element 64R is shown. Conversely, arm 112Ris located at the right rear of element 64R in position to engage thecam on the front element 64F.

Adjacent pairs of arms 110F, 112R or 110R, 112F on the same side of theunit are operatively interconnected by tension springs 116 that normallybias and hold the gate closed by keeping the jaws 66 in sealedengagement with one another. As will be explained in detail presently,counterrotational movement of the shoe-carrying elements causes the camfollowers 114 to leave the notches 106 and ride up onto cylindrical camsurfaces 104 thus opening the gate formed by the jaws 66. Later, as thecam followers reach the end of the cylindrical cam surfaces and areallowed to return to their respective notches under the influence of thebias exerted thereon by springs 116, the jaws snap closed into sealedengagement around the neck of the bag.

Directing the attention next to FIGS. 3-9, inclusive, the operatingcycle will be set forth in detail. To prepare the unit for use, it isfirst necessary to lift the top section and withdraw by hand a length oftube from the magazine. A knot 52 is tied in the end and it is passeddown between the secondary shoes Tilt and gate-forming jaws as into theinitial position shown in FIG. 3. These elements can be opened farenough to pass the knotted bag by pulling on the lanyard so as toactuate the bagpulling mechanism into the position shown in FIGS. 4 or 5before returning it to its starting position. Note at the beginning thatthe neck till of the bag formed by the knotted tube is sealed at twopoints one above the other by both the springloaded jaws M and thesecondary shoes 7%. The unit is now ready for use.

The waste products are trapped in that portion of bag lying above theseal formed by the secondary shoes and, of course, beneath the magazine.When the time comes to temporarily dispose of the waste products, thehandle of the lanyard is pulled and counterrotation of the shoe-carryingelements 64 in the direction of the arrows commences. Looking at FIG. l,it can be seen that two operations occur immediately, namely, thesecondary shoes 78 begin to move apart releasing the seal formedtherebetween and, secondly, the cam followers begin their emergence fromthe notches 11041 as they ride up on the trailing edges thereof thusopening the jaws 6b in opposition to the bias exerted thereon by thetension springs llllti. The latter action also opens the second seal andreleases the neck fill: of the bag all the way down to the knot so thatthe waste products can begin dropping down therein.

Progressing onto FIG. 5, the secondary shoes and springloaded jaws haveboth opened even wider, the latter elements having reached their maximumspread as the cam followers have just left the notches we and are nowriding on the cylindrical cam surfaces 14M. While the secondary shoeswill continue to move farther apart, the primary shoes 76 have alreadyrotated into a position where they have begun to engage the bag,therefore, the neck of the bag is opened as far as it is permitted toopen in FIG. h. As this occurs, all of the waste products have droppeddown well beneath the point at which the primary shoes engage the neckof the bag.

Moving next to FIG. 6, the secondary shoes have moved into inoperativepositions on the remote sides of the shoe-car rying elements while thejaws as remain fully open as the cam followers continue to ride out onthe cylindrical cam surfaces. Meanwhile, however, the leading edges ofthe primary shoes have moved together squeezing the bag therebetween andwith the waste products trapped therebeneath. As these primary shoescome together, they not only squeeze the bag but they commence pulling afresh supply thereof from the magazine. While the cylindrical surfacesof these primary shoes subtend arcs of only between 3 and 4 inches, theyactually engage the surface of the bag 2h long before they come together(FlG. 5) and in moving from the position shown in FIG. 5 to that of FIG.16, they have already cooperated to pull several inches of tubing fromthe magazine. Then, in moving from the position of FIG. 6 to that ofFIG. 7, 3 or 4 more inches of bag are pulled making a total of at leastsix by the time the assembly reaches the position of FIG. 7.

In FIG. ll, the primary shoes have released their grip on the bag andmoved out into their remote inoperative positions on the outside of theshoe-carrying elements. The jaws as are still being held open by the camfollowers riding out on the cylindrical surfaces of the cam track;however, they are approaching the leading edges of the notches lilo intowhich they will soon drop, thus releasing the jaws into their closedpositions. In the meantime, the secondary shoes have, once again,engaged the bag and pulled a little bit more of it from the magazine asthey move together into sealed contact with the neck thereof. ldy thistime, the waste products have dropped down well beneath the entire bagpulling mechanism and are resting on the bottom of the base in thestorage compartment formed by the latter.

Finally, as the secondary shoes return to their original positions shownin FIG. 9 from the FIG. d position to thus complete the bagpulling andwaste disposal cycle, they will have pulled another inch or two of bagfrom the magazine making a total of an average of approximately 8 inchesmore or less. Just before the shoe-carrying elements complete theirsingle revolution, cam followers 11M drop off the cylindrical camsurfaces lltl i into the bottom of the notches res past the leadingedges of the latter thus releasing the jaws as to snap into sealedengagement with the neck of the bag therebetween under the influence ofthe bias exerted thereon by springs llllti. At this point the operatingcycle is complete and the recoiltype actuating mechanism operated bylanyard 9d can be released to return to its starting position.

The waste products remain stored temporarily in the compartment providedfor this purpose in the bottom of the housing with a double seal aroundthe neck of the bag thereabove that remains in tact between uses. Themechanism as shown in FIG. 9 is ready for reuse at any time. The numberof uses that can take place before the waste temporarily stored in thestorage compartment must be removed and permanently disposed of is, ofcourse, a function of the length of tubing that can be accommodated inthe magazine. Once the tubing in the magazine is exhausted a second knotis tied in the end thereof and the entire bag with the waste sealedtherein is placed in another bag for removal from the storagecompartment. These other bags have not been shown but several can bestored in the bottom of the cabinet or housing for use when needed.

What is claimed is:

ll. In a waterless water closet of the type having a cabinet topped by aseat with a waste-receiving opening therein, a magazine locatedunderneath the seat containing an annular compartment encircling theopening is the latter communicating the interior of the cabinet, and alength of foldable thinwalled tubing stored in the annular compartment,the im' proved bag-pulling mechanism which comprises: a pair ofshoe-carrying elements journalled for rotation inside the cabinetbeneath the waste-receiving opening in side-by-side parallel relationabout horizontal axes, each of said shoe-carrying elements having aprimary shoe and a secondary shoe projecting radially in oppositedirections from the axes thereof while cooperating to define gaps ofsubstantial angular extent therebetween, the primary shoes havingcylindrically curved outer surfaces extending substantially the fulllength of the shoe-carrying elements adapted upon counterrotationalmovement of the latter to close against opposed faces of the tubing whenpassed therebetween and pull an unused section thereof from the magazinewith a wringerlike roller action, the secondary shoes being located andadapted to cooperate with one another to engage and form a seal aroundthe tubing upon further counterrotational movement of the shoe-carryingelements into a second position, and said pairs of primary and secondaryshoes cooperating with one another and with one of the pairs of gapslocated therebetween upon counterrotational movement of theshoe-carrying elements into a third position so as to open the tubingand permit waste products to gravitate therethrough; a pair ofgate-forming jaws located beneath the shoe-carrying elements in parallelrelation on opposite sides of the tubing for movement between an openinoperative position and a closed operative position gripping opposedfaces of the tubing therebetween to define a seal; spring means connected between the gate-forming jaws operative to normally bias sameinto closed position; cam means connected to at least one of theshoe-carrying elements for rotational movement therewith; cam followermeans connected between at least one of the gate-forming jaws and thecam means operative to cooperate with the latter to move said jaws intoopen position and maintain such position throughout thecounterrotational movement of the shoe-carrying elements until thesecond position thereof is reached, and said elements cooperating insaid second position to release said jaws into closed position alongwith the secondary shoes; power transfer means operativelyinterconnecting the shoe-carrying elements for synchronouscounterrotational movement; and, drive means connected to one of theshoe-carrying elements operative upon actuation to cooperate with thepower transfer means and counterrotate said shoe-carrying elementsthrough one complete revolution in a direction to pull tubing from themagazine.

2. The improvement as set forth in claim 1 in which: the drive means isoperative to counterrotate the shoe-carrying elements through onecomplete revolution beginning and ending in the second position thereofwhen both the secondary shoes and gate-forming jaws engage the tubingthus forming a double seal therearound.

3. The improvement as set forth in claim 1 in which: compressibleelastic cushions are provided on the faces of the primary and secondaryshoes that contact the tubing.

4. The improvement as set forth in claim 1 in which: cam means arelocated in one end of each roller; a cam follower means operativelyconnects one of said cam means to each of the gate-forming jaws, andsaid cam means and cam follower means cooperate to open and close bothof said jaws simultaneously.

5. The improvement as set forth in claim 1 in which: the gate-formingjaws comprise mating parallel crosspieces mounted at one extremity of apair of dog-leg cranks pivotally mounted at opposite ends of eachshoe-carrying element for rotational movement relative thereto; the cammeans comprise circular disks with a cylindrical cam surface interruptedby a single notch; and, in which the cam follower means comprise an armprojecting from the other extremity of one of the pair of dog-leg cranksonto the cam surface of a cam means located on the same end of the othershoe-carrying means.

6. The improvement as set forth in claim 1 in which: compressibleelastic cushions are provided on the mating edges of the secondary shoesthat cooperate therewith to permit said shoes to engage and grip thetubing therebetween in advance of the arrival thereof at said secondposition so as to pull a further section of tubing from the magazine.

7. The improvement as set forth in claim 1 in which: the drive meanscomprises a manually operated single revolution cranking means.

8. The improvement as set forth in claim 1 in which: the power transfermeans comprises a pair of meshed spur gears connected to turn theshoe-carrying elements.

9. The improvement as set forth in claim 3 in which: compressibleelastic cushion-forming means are provided on the mating edges of thegate-forming jaws.

10. The improvement as set forth in claim 5 in which: the dog-leg cranksare pivotally mounted for independent relative rotational movement aboutthe same axis of rotation as their respective shoe-carrying elements.

1. In a waterless water closet of the type having a cabinet topped by aseat with a waste-receiving opening therein, a magazine locatedunderneath the seat containing an annular compartment encircling theopening is the latter communicating the interior of the cabinet, and alength of foldable thin-walled tubing stored in the annular compartment,the improved bagpulling mechanism which comprises: a pair ofshoe-carrying elements journalled for rotation inside the cabinetbeneath the waste-receiving opening in side-by-side parallel relationabout horizontal axes, each of said shoe-carrying elements having aprimary shoe and a secondary shoe projecting radially in oppositedirections from the axes thereof while cooperating to define gaps ofsubstantial angular extent therebetween, the primary shoes havingcylindrically curved outer surfaces extending substantially the fulllength of the shoe-carrying elements adapted upon counterrotationalmovement of the latter to close against opposed faces of the tubing whenpassed therebetween and pull an unused section thereof from the magazinewith a wringerlike roller action, the secondary shoes being located andadapted to cooperate with one another to engage and form a seal aroundthe tubing upon further counterrotational movement of the shoe-carryingelements into a second position, and said pairs of primary and secondaryshoes cooperating with one another and with one of the pairs of gapslocated therebetween upon counterrotational movement of theshoe-carrying elements into a third position so as to open the tubingand permit waste products to gravitate therethrough; a pair ofgate-forming jaws located beneath the shoe-carrying elements in parallelrelation on opposite sides of the tubing for movement between an openinoperative position and a closed operative position gripping opposedfaces of the tubing therebetween to define a seal; spring meansconnected between the gate-forming jaws operative to normally bias sameinto closed position; cam means connected to at least one of theshoe-carrying elements for rotational movement therewith; cam followermeans connected between at least one of the gate-forming jaws and thecam means operative to cooperate with the latter to move said jaws intoopen position and maintain such position throughout thecounterrotational movement of the shoe-carrying elements until thesecond position thereof is reached, and said elements cooperating insaid second position to release said jaws into closed position alongwith the secondary shoes; power transfer means operativelyinterconnecting the shoe-carrying elements for synchronouscounterrotational movement; and, drive means connected to one of theshoe-carrying elements operative upon actuation to cooperate with thepower transfer means and counterrotate said shoe-carrying elementsthrough one complete revolution in a direction to pull tubing from themagazine.
 2. The improvement as set forth in claim 1 in which: the drivemeans is operative to counterrotate the shoe-carrying elements throughone complete revolution beginning and ending in the second positionthereof when both the secondary shoes and gate-forming jaws engage thetubing thus forming a double seal therearound.
 3. The improvement as setforth in claim 1 in which: compressible elastic cushions are provided onthe faces of the primary and secondary shoes that contact the tubing. 4.The improvement as set forth in claim 1 in which: cam means are locatedin one end of each roller; a cam follower means operatively connects oneof said cam means to each of the gate-forming jaws, and said cam meansand cam follower means cooperate to open and close both of said jawssimultaneously.
 5. The improvement as set forth in claim 1 in which: thegate-forming jaws comprise mating pArallel crosspieces mounted at oneextremity of a pair of dog-leg cranks pivotally mounted at opposite endsof each shoe-carrying element for rotational movement relative thereto;the cam means comprise circular disks with a cylindrical cam surfaceinterrupted by a single notch; and, in which the cam follower meanscomprise an arm projecting from the other extremity of one of the pairof dog-leg cranks onto the cam surface of a cam means located on thesame end of the other shoe-carrying means.
 6. The improvement as setforth in claim 1 in which: compressible elastic cushions are provided onthe mating edges of the secondary shoes that cooperate therewith topermit said shoes to engage and grip the tubing therebetween in advanceof the arrival thereof at said second position so as to pull a furthersection of tubing from the magazine.
 7. The improvement as set forth inclaim 1 in which: the drive means comprises a manually operated singlerevolution cranking means.
 8. The improvement as set forth in claim 1 inwhich: the power transfer means comprises a pair of meshed spur gearsconnected to turn the shoe-carrying elements.
 9. The improvement as setforth in claim 3 in which: compressible elastic cushion-forming meansare provided on the mating edges of the gate-forming jaws.
 10. Theimprovement as set forth in claim 5 in which: the dog-leg cranks arepivotally mounted for independent relative rotational movement about thesame axis of rotation as their respective shoe-carrying elements.